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Nature Based Control Structures - Universidade Federal do ... · PDF file Nature Based Control Structures Luís Gustavo Soares Longhi PETROBRAS PSE-BR 2019 – Process Systems...

May 27, 2020

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  • Nature Based Control

    Structures

    Luís Gustavo Soares Longhi

    PETROBRAS

    PSE-BR 2019 – Process Systems Engineering

  • QUESTIONS

    Questions?

     What is the main function of control/feedback?

     What is the more important information would you

    save from a process control project?

    What is an optimum (great) control project?

    How does nature "solve" this problem?

    Why do industry control projects sometimes not work?

  • The most valuable information

  • What is an optimum (great) control project?

  • What is an optimum (great) control project?

  • How does nature "solve" this problem?

    • Multivariable systems  Multivariable Control (always

    operating, but alternating dominant effects)

    • Multivariable Control ≠ Dense matrix control (APC old days)

     The number of controllers required for a MISO or SIMO system to operate

    properly in closed loop must be at least equal to the highest number of MVs or

    CVs in this system. If we restrict to the minimum, this condition is sufficient,

    since all relations between CVs and MVs can still be taken into account. The

    required condition of this heuristic is also true for MIMO systems. However, in

    this case, the sufficiency condition does not apply because the minimum

    number of controllers may be insufficient to ensure a good performance due to

    the neglected relationships between CVs and VMs.

  • Examples

  • Examples

  • Examples

  • Examples

  • Examples

  • Examples

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